ul {
  width: 500px;
  margin: 100px auto;
}

.li-item {
  height: 50px;
  line-height: 50px;
  text-align: center;
  background-color: green;
  border-radius: 50px;
  margin-bottom: 10px;
  color: #fff;
}

.li-item.moving {
  background-color: transparent;
  border: 1px solid #ccc;
}